Engine Cooling Temperature - Data Valid Out Of Range
The engine cooling temperature is reporting a value that is outside the expected range.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine computer expects the coolant temperature to be between 180°F and 220°F during normal operation. If the temp is below 150°F or above 250°F, it throws this code because it detects an abnormal reading.
What the computer is actually seeing
The engine control module (ECM) monitors the coolant temperature sensor signal. It expects a voltage range of about 0.5V (around -40°F) to 4.5V (around 275°F). If it reads less than 0.1V or more than 4.9V, the ECM sees this as an out-of-range condition.
What a healthy reading looks like
Coolant temperature should typically measure between 180°F and 220°F (82°C to 104°C) under normal conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check coolant level; should be at the proper fill level. If low, add coolant and retest.
- 2Inspect the wiring and connector to the coolant temperature sensor for damage or corrosion. Repair as needed.
- 3Use a scan tool to read the actual coolant temperature. Compare it with a known good reading (room temperature vs. engine running temp). If vastly different, replace the sensor. Test the old sensor with an ohmmeter if possible. The resistance should drop as temperature increases.
- 4If the sensor checks out, use a thermal gauge or infrared thermometer to check engine temp. If readings reach extreme highs or lows compared to the gauge, investigate potential thermostat issues. Replace if faulty.
Common causes
- Faulty coolant temperature sensor
- Wiring issues (frayed wires, bad connections)
- Coolant level low
- Thermostat stuck open or closed
- Coolant temperature sensor circuit shorted
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity, so while it may not cause immediate safety issues, drive with caution until fixed as it could cause engine overheating or poor performance.
Will this code come back after I fix it?
If properly diagnosed and repaired, the code should not return, but always check related systems.
Why does this code often pair with low coolant?
Low coolant affects the temperature readings, leading to erroneous sensor data which triggers this code.
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